Contour farmng on Cyril Rees' farm NE of Pleasantville in Marion County, Iowa. 25 acre field seeded to oats on contour with buffer strips following corn in 1943. Buffers and waterways seeded in 1941. Very little erosion.
Erosion on Joe M. Johnston's farm 10 miles NW of Knoxville in Marion County, Iowa. Every other row of corn washed out of this 40-acre field. Worked and planted up and down hill 30 to 40 tons of soil loss per acre.